" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
sin^2 a - 2 sina. Cos a + cos^2 a
(Sin^2a + cos^2a ) - 2sina.cosa
1 - 2sina.cos akan senilai dengan
2 - (sina + cos a)^2 (terbukti)